The PHOTON 100: The First CMOS Active Pixel Sensor for X-ray Crystallography

Transcription

1 The PHOTON 100: The First CMOS Active Pixel Sensor for X-ray Crystallography Bruker AXS Madison, WI Innovation with Integrity

2 Welcome Today s Topics Speakers Image Sensors CMOS vs CCD Scientific applications Introducing the new PHOTON 100 D8 Crystallography Solutions D8 QUEST D8 VENTURE PHOTON 100 data Michael Ruf Global Product Manager, SC-XRD Madison, WI USA Roger Durst Executive VP and CTO Madison, WI USA

3 Image sensors An image sensor is a device that converts an optical image into an electronic signal A modern sensor is typically a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) active pixel sensor Both types of sensor accomplish the same task of capturing light and converting it into electrical signals Both types of sensor are silicon devices 6/23/2011 3

4 CMOS versus CCD CMOS detector technology has begun to rapidly displace CCDs in most high-end applications CMOS technology provides many advantageous features and is quickly developing CCD technology has matured and has reached its performance limit as good as it gets 6/23/2011 4

5 CMOS Sensor Technology in professional photography Google: Best professional digital SLR cameras review All major manufacturers flagship professional digital SLR cameras use large format CMOS sensors Nikon s D3X uses Nikon s FX-format CMOS sensor Canon s EOS-1D Mark III/IV uses Canon s full frame CMOS sensor Olympus E-3 uses the 4/3 type Hi-Speed Live MOS sensor Sony Alpha DSLR-A900 Pentax K-7 6/23/2011 5

6 CMOS Sensor Technology in professional photography Current good quality sensors in digital cameras are photon noise limited (counting statistics) The foremost factor distinguishing high-end sensors for professional use from other image sensors is The larger pixel size, which allows it to collect more light Larger sensor size Larger pixels have higher signal-to-noise ratio at all levels, but especially at low signal levels The Nikon FX-format sensor has a size of 36 mm 24 mm with a pixel size of 8.45 μm 8.45 μm Bruker s CMOS sensor is 11.5 times larger and its pixels have a 130 times larger area! 6/23/2011 6

7 CMOS Sensor Technology in scientific applications Astronomy - Stellar scintillation the light of the star is refracted many times and in random directions when it hits a change in density in earth s atmosphere Sensitive, low-noise, high-speed CMOS sensors are used to selectively assemble undistorted images CCD Light from a star CMOS random refraction lucky imaging Astronomy: Palomar 5m Lucky Imaging 6/23/2011 7

8 CMOS Sensor Technology in scientific applications Terrain Mapping Cameras CMOS Hyper Spectral mapping of lunar surface in visible and near infrared spectral regions Very high dynamic range of the sensor helps in taking excellent features of dark polar sections of moon surface Satellite Imaging: TMC Light microscopy CMOS is unique in its ability to simultaneously offer ultralow noise, extremely fast frame rates, wide dynamic range, high resolution and a large field of view CMOS CCD Microscopy: Fluorescently labeled fixed cell (x60 oil objective) 6/23/2011 8

9 New PHOTON 100 Detector for X-ray crystallography Large 100 cm 2 sensor for fast and efficient data collection Low-power consumption sensor for high-reliability Air-cooled for low maintenance High sensitivity No glass fiber taper for superior spatial accuracy Optimized pixel size and point spread function for superior signal Large pixel volumes for best light conversion 6/23/2011 9

10 PHOTON 100 CMOS Sensor for X-ray crystallography First CMOS active pixel sensor for X-ray diffraction Large 10 x 10 cm 2 active area Seamless, no gaps or dead areas 96 micrometer pixels High sensitivity, near quantum limited Fast 0.5 sec readout for fast data collection Real-time hardware data correction No frame correlation needed No blooming or streaking for best data quality Capable of continuous scan mode shutter-less operation 6/23/

11 Introducing the PHOTON 100 The first CMOS active pixel sensor (APS) detector for crystallography 100 x 100 mm 2 active area Taper-free: no demagnification Air-cooled Cu/Mo/Ag High sensitivity High reliability 3-year detector warranty Fast readout Zero readout dead time mode 6/21/11 11

12 6/21/11 12 CCD CCD: charge is shifted from one pixel to the next until it reaches the readout amplifier Similar to a shift register

13 6/21/11 13 CMOS active pixel sensor CMOS: charge is readout from each pixel through a readout bus Similar to a random access memory X-rays converted in phosphor screen (like CCD)

14 PHOTON 100 CMOS imager The world s largest production sensor for X-ray imaging 100 x 100 mm x 1024 pixels Exclusive to Bruker 4 times larger than the KAF 4320 CCD used in many detectors 6/21/11 14

15 PHOTON 100: taper-free design Like the APEX II, the PHOTON 100 does not require a fiber optic taper Better sensitivity Better spatial resolution No distortion (better unit cells) No zingers! 6/21/11 15

16 CMOS continuous scans: shutter free Unlike a CCD, a CMOS detector can be readout without closing the X-ray shutter This eliminates the dead time between frames Significantly decreases wall time, especially for short exposures Also eliminates timing jitter (which for short frames can be the dominant error) 0.5 sec jitter error 2%! 6/21/11 16

17 How do continuous scans improve data? Hasegawa et al. (SPRING-8) studied the effect of continuous scans on data quality 2-sec exposures, lysozyme Reported 10-20% improvement in I/s depending on exposure time Equivalent to 20-40% increase in intensity (or exposure time) 6/21/11 17

18 6/21/11 18 How does the PHOTON 100 compare to conventional detectors? Detective Collection Efficiency (DCE) quantifies the contribution of detector size, sensitivity, and readout speed on performance DCE is proportional to the wall clock time to achieve equivalent data statistics DCE DQE 1 4 size f dead speed CMOS APS CCD Hybrid-CMOS Image Plate sensitivity

19 PHOTON 100: A smart camera In CCD detectors corrections (dark, flood, bad pixel, and spatial) are applied after readout in software Slows down data acquisition and processing In the PHOTON 100, all corrections are applied inside the camera, in real time in a high performance pipeline processor Data output from camera is fully corrected No added dead time Flood field and dark files stored in the camera nonvolatile memory New floods and darks can easily be collected and stored (in the camera) by the user Up to 125,000 frames of data can be stored in the camera memory (250 GB) 6/21/11 19

20 Other CMOS advantages: Resistance to blooming CCDs suffer blooming of strong signals Typically seen as a degradation in the quality of low resolution data CMOS is immune to blooming Handles strong signals better, delivers superior low resolution data CCD CMOS 6/21/11 20

21 PHOTON 100 comparison to CCDs: The details PHOTON 100 Agilent ATLAS Active area (mm 2 ) 100 x x 100 Sensor size (mm 2 ) 100 x x 50 Gain (electrons) * Detective Collection Efficiency Dynamic range 16,000 14,000* Taper No Yes Spatial Distortion No Yes Cooling Air Water Anti-blooming Yes No Real-time data correction Yes No Continuous scans (shutter-free) Yes No Warranty (years) 3 1 *Measured 6/21/11 21

22 Other PHOTON advantages: reliability CMOS detectors exhibit higher reliability (that is, a longer Mean Time Between Failures) due to lower operating voltage CCD: 30 V CMOS: 3 V We are passing this reliability advantage on in the form of the first (and only) 3-year factory warranty for the PHOTON 100 6/21/11 22

23 Summary The PHOTON 100 is the next generation of X-ray detector technology Large active area No fiber taper No dead areas No zingers Air-cooled High sensitivity Intrinsic anti-blooming Smart camera: built in processor, memory Real time corrections Shutter-free operation High reliability: 3-year warranty 6/21/11 23

24 D8 Crystallography Solutions D8 QUEST D8 VENTURE 6/23/

25 D8 QUEST Configurations Single-source sealed tube and IμS systems TRIUMPH optional FIXED-CHI Manual track Motorized track KAPPA Motorized track PHOTON 100 All air-cooled configurations Low-temperature device KRYOFLEX II Cryostream 6/23/

26 D8 VENTURE Configurations Single-source sealed tube and IμS systems Dual-source systems Sealed tube IμS TRIUMPH optional IμS - IμS FIXED-CHI Manual track Motorized track KAPPA Motorized track PHOTON 100 All air-cooled configurations Low-temperature device KRYOFLEX II Cryostream 6/23/

27 PHOTON 100 data Large field of view 87 in 2Theta at 5 cm distance 109 in 2Theta at 4 cm distance Homogenous background No gaps Low noise Beamstop shadow and mount shadow are visible from a 10s exposure Large dynamic range Good spatial resolution 6/23/

28 PHOTON 100 data D8 VENTURE with IμS Cu MX 147 2Theta (0.82 Å) Diffraction pattern of a Li-Phthalocyanine complex Strong diffraction spots at 147 2Theta (0.82 Å) 30s exposure Detector edge at 152 2Theta (0.80 Å) No spots detected on a customer Mo-sealed tube system 6/23/

29 PHOTON 100 data - Bispyrazolone D8 VENTURE with IμS Cu MX Improved instrument design allows data to higher resolution 0.81 Å D8 VENTURE 0.84 Å X8 PROSPECTOR Good structure from small weakly diffracting organic sample 0.06 mm x 0.11 mm x 0.14 mm R1 = 4.45% 6/23/

30 PHOTON 100 data Ylid D8 QUEST with Mo TRIUMPH Ylid is the best understood structure at Bruker and invaluable for judging instrument quality Ylid meets manufacturing specifications PHOTON 100 handles strong and weak reflections well R1 = 2.45% 6/23/

31 PHOTON 100 data Ruby D8 QUEST with Mo TRIUMPH D8 QUEST with PHOTON 100 delivers best unit cell data Ruby unit cell data is very accurate Better than 1 in 1000 or 0.1% Handles strong diffraction well R(int) = 1.89% R(sigma) = 0.76% R1 = 2.05% to 0.6 Å 6/23/

32 PHOTON 100 data Vitamin C D8 VENTURE with IμS Cu MX D8 VENTURE handles well diffracting samples better Longer exposure times are possible without saturating the detector Weaker signals can be detected more accurately Better data than X8 PROSPECTOR (APEX II CCD) D8 VENTURE: R1 = 2.39% X8 PROSPECTOR: R1 = 2.60% 6/23/

33 Small Environmental Footprint Systems For the first time completely air-cooled systems are available No compromise on performance Preservation of natural resources 1,700 m 3 of water saved per year 43,000 kwh of electrical energy per year Reduced carbon footprint 26 metric tons of CO 2 per year Reduced noise No recirculating chillers 6/23/

34 Q & A Any Questions? Please type any questions you may have for our speakers in the Q&A panel and click Send

35 Innovation with Integrity Copyright 2011 Bruker Bruker Corporation. Corporation. All rights reserved. All rights reserved.